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RTX 5090 Custom Build in NZXT H9 Flow RGB White - $7,920 SGD | Mansa Computers
Quick answer:
This RTX 5090 custom build in Singapore has the Ryzen 7 9800X3D and Zotac RTX 5090 32 GB inside the NZXT H9 Flow RGB (2025) in White, priced at $7,920 SGD and assembled by Mansa Computers.
Last updated: December 2025
AT A GLANCE
Build Summary
Build Type
4K Gaming PC
Key Components
Ryzen 7 9800X3D + RTX 5090 32 GB
Case
NZXT H9 Flow RGB (2025) - White
Price
SGD $7,920
Watch the Build
A White RTX 5090 Custom Build in the NZXT H9 Flow RGB
This RTX 5090 custom build in Singapore puts the Ryzen 7 9800X3D and Zotac RTX 5090 32 GB inside the white NZXT H9 Flow RGB (2025), priced at $7,920 SGD and assembled by Mansa Computers. Cooling comes from the Corsair ARGB Nautilus RS 360 AIO (All-in-One liquid cooler) in white. The build runs an all-white colour scheme from the case and cooler through to the Corsair RGB Vengeance DDR5 in White and the Seasonic Focus GX 1000 W PSU in white.
The white NZXT H9 Flow RGB (2025) has a panoramic tempered glass side and front panel, with a dual-chamber layout that routes cables and the PSU behind a divider for a clean interior view. Three ARGB fans are included in the build alongside the 360mm AIO radiator.
The Ryzen 7 9800X3D is an 8-core Zen 5 AM5 processor with 3D V-Cache, running on the MSI B850 MPG Edge Ti motherboard with Wi-Fi 7 and Bluetooth. Storage is a Lexar NM790 4 TB NVMe (Non-Volatile Memory Express) Gen 4 SSD. Memory is 32 GB DDR5 at 6000 MHz. Power comes from the Seasonic Focus GX 1000 W 80+ Gold in White.
FULL SPECS
What's Inside
Motherboard
MSI B850 MPG Edge Ti Wi-Fi 7 & Bluetooth
Processor
Ryzen 7 9800X3D
Cooler
Corsair ARGB Nautilus RS 360 AIO - White
Graphics Card
Zotac Nvidia RTX 5090 32 GB
Storage
Lexar NM790 4 TB Gen 4 SSD
RAM
Corsair RGB Vengeance 32 GB DDR5 6000 MHz - White
Power Supply
Seasonic Focus GX 1000 W 80+ Gold - White
Case
NZXT H9 Flow RGB (2025) - White
Operating System
Activated Windows 11 Home 64-Bit
Fans
3 x ARGB Fans
Build Photos
Swipe or use arrows to see more photos.
CPU Area & AIO Cooler
A close-up of the CPU section, showing the Corsair ARGB Nautilus RS 360 AIO, MSI B850 MPG Edge Ti motherboard, and Corsair RGB Vengeance memory inside the white build.
Graphics Card Detail
A closer look at the Zotac Nvidia RTX 5090 32 GB inside the system, highlighting the clean white layout, visible GPU support bracket, and premium interior presentation.
Front I/O Detail
A close-up of the front I/O area on the NZXT H9 Flow RGB, showing the power button, USB ports, and the clean white exterior finish.
Rear I/O & Connectivity
A rear view of the completed system, showing the motherboard rear I/O, GPU output section, and the airflow-focused rear panel layout.
The Full Build
A full view of the completed white build, showing the clean internal layout, large GPU presence, RGB lighting, and tidy showcase presentation inside the NZXT H9 Flow RGB.
PERFORMANCE
Performance at 4K
In testing by GamersNexus, the RTX 5090 32 GB hit 207 FPS in Resident Evil 4, 182 FPS in Final Fantasy XIV, 133 FPS in Dragon's Dogma 2, 126 FPS in Dying Light 2, and 108 FPS in Starfield, all at 4K. The card draws 575 W TGP (Total Graphics Power) at load, per Nvidia's official specification.
The Ryzen 7 9800X3D's 3D V-Cache keeps the CPU from bottlenecking the RTX 5090 in game-heavy loads. The 32 GB of DDR5 at 6000 MHz covers memory-intensive workloads, and the 4 TB NVMe SSD stores a large game library without running short. The build ships with Activated Windows 11 Home 64-Bit installed.
"RTX 5090 is the card you want for 4K gaming at maximum settings with all RT eye candy enabled."
TechPowerUpTotal Price
SGD $7,920
Pricing as of December 2025. Component prices change with market conditions. Press the WhatsApp button on the right to speak with us if you need help with a PC build for a current quote.
FAQ
Frequently Asked Questions
How fast is the RTX 5090 at 4K?
GamersNexus tested the RTX 5090 at 4K and recorded 207 FPS in Resident Evil 4, 182 FPS in Final Fantasy XIV, 133 FPS in Dragon's Dogma 2, 126 FPS in Dying Light 2, and 108 FPS in Starfield. It is the fastest consumer GPU available as of April 2026.
What is the NZXT H9 Flow RGB (2025)?
The NZXT H9 Flow RGB (2025) is a mid-tower ATX case with panoramic tempered glass on the front and side panels for a full view of the interior. It uses a dual-chamber design that separates the PSU and cables behind a divider, keeping the main component area clean. The 2025 version includes ARGB fans. This build is in white.
Does this PC come with Windows 11?
Yes. This build ships with Activated Windows 11 Home 64-Bit installed. No separate purchase or activation code needed.
Want Something Like This?
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